The production of bio-organic fertilizer begins with the pretreatment stage. This stage directly affects the effectiveness of subsequent fermentation and granulation, and is fundamental to ensuring fertilizer quality.

Upon arrival, raw materials are first sorted. Various types of livestock and poultry manure, straw, and other raw materials undergo preliminary screening to remove impurities such as stones and plastics. This step relies on specialized bio-organic fertilizer equipment to provide clean raw materials for subsequent processing.

Next comes crushing and mixing. Crushing equipment is used to process large pieces of raw material into uniform fragments. This not only optimizes the physical properties of the material but also facilitates the uniform action of subsequent microorganisms. Subsequently, different raw materials are added to a fertilizer mixer machine according to the formula for mixing. If producing a product with both organic and inorganic nutrients, nutrients provided by the NPK fertilizer production line are precisely added at this stage to achieve a scientific ratio and uniform distribution of nutrients.

A crucial step is the adjustment of moisture and carbon-nitrogen ratio. By adding auxiliary materials or water, the mixture is adjusted to a suitable humidity range for fermentation, while simultaneously balancing the carbon-nitrogen ratio to create an ideal environment for microbial activity. The processed material is then transported to the fermentation zone, completing the pretreatment process.

The entire pretreatment process, through the coordinated operation of a series of bio-organic fertilizer equipment, transforms raw waste into standardized material suitable for fermentation. The meticulous operation of this stage not only lays the foundation for efficient fermentation but also directly affects the pelleting rate and quality of the subsequent organic fertilizer granulator.